New PMP Question & Answers with explanation

Contract phases are closely related to the Project Procurement Management Knowledge Area processes. All of the following are true except for which one?
Select one
Which contract type can incorporate incentives for meeting or exceeding certain contract deliverables above a firm price for the goods or services rendered?
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A project manager is in the process of developing the project charter and is using a hybrid project management approach. Almost immediately, he identifies several constraints. Where is he likely to document the constraints and maintain regular updates as they change throughout the project?
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Availability, cost, and ability are examples of what?
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You are a lead project manager for a company that develops and manufactures healthcare devices. Your team has recently begun to adopt Agile practices after receiving the directive from the division president. What power type is at play in this scenario?
Select one